All of us know that you have to be a little crazy to be an entrepreneur. Launching, let alone sustaining, a new enterprise can be challenging along almost every dimension − mentally, emotionally, and often financially. Historically, this reality has been even more sobering in the health care sector, where the typical hardships experienced by any start-up have been amplified by numerous industry-specific challenges: Extensive regulation, entrenched players with a strong grip on the status quo, confusing paths to entry, and an even more opaque path to payment have made health care a particularly treacherous territory for entrepreneurs. But ongoing changes ...